40%=0.4
0.4(20)
8(markup)
Shirt price=$20+ $8
New price=$28
My understanding is that the 2 angles add up to 180 degrees, so 9x+9y-54=180. Also, 9x=90 and 9y-54=90. 9x=90, so x=10. 9y=90+54. 9y=144. y=16.
5k^2–7k-4 it says I have to write 20 characters so here
I think that it would be the first one A
